The tweak above will display your Custom Field metadata as the last item(s) on your post before the standard credit line. If you want your metadata to appear somewhere else, you'll need to experiment moving the call around in your code.

I'm sure there are many, many other ways to get this working. This is A way, not necessarily THE way.

I sincerely hope this helps ease any frustration you have. It worked for me but as usual, your mileage may vary...